The hemodynamic parameters of the middle cerebral artery(MCA),renal artery (RA),coeliac artery (CA),and superior mesenteric artery (SMA) were measured by color Doppler ultrasound.

• 采用彩色多普勒超声,分别测定新生儿大脑中动脉(MCA)、肾动脉(RA)、腹腔动脉(CA)以及肠系膜上动脉(SMA)的血流动力学各项参数。